2002423656 has 64 divisors (see below), whose sum is σ = 5209459200. Its totient is φ = 640882368.

The previous prime is 2002423651. The next prime is 2002423663. The reversal of 2002423656 is 6563242002.

It is not an unprimeable number, because it can be changed into a prime (2002423651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44445 + ... + 77331.

It is an arithmetic number, because the mean of its divisors is an integer number (81397800).

Almost surely, 2^2002423656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2002423656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2604729600).

2002423656 is an abundant number, since it is smaller than the sum of its proper divisors (3207035544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2002423656 is a wasteful number, since it uses less digits than its factorization.

2002423656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32998 (or 32994 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 2002423656 is about 44748.4486435005. The cubic root of 2002423656 is about 1260.4297803209.

Adding to 2002423656 its reverse (6563242002), we get a palindrome (8565665658).

The spelling of 2002423656 in words is "two billion, two million, four hundred twenty-three thousand, six hundred fifty-six".